From: Aldy Hernandez <aldyh@redhat.com>
To: GCC patches <gcc-patches@gcc.gnu.org>
Cc: Andrew MacLeod <amacleod@redhat.com>, Aldy Hernandez <aldyh@redhat.com>
Subject: [COMMITTED] Avoid comparing ranges when sub-ranges is 0.
Date: Mon, 3 Oct 2022 13:08:14 +0200 [thread overview]
Message-ID: <20221003110815.1075975-3-aldyh@redhat.com> (raw)
In-Reply-To: <20221003110815.1075975-1-aldyh@redhat.com>
There is nothing else to compare when the number of sub-ranges is 0.
gcc/ChangeLog:
* value-range.cc (irange::operator==): Early bail on m_num_ranges
equal to 0.
---
gcc/value-range.cc | 3 +++
1 file changed, 3 insertions(+)
diff --git a/gcc/value-range.cc b/gcc/value-range.cc
index ddbcdd67633..e1066f4946e 100644
--- a/gcc/value-range.cc
+++ b/gcc/value-range.cc
@@ -1260,6 +1260,9 @@ irange::operator== (const irange &other) const
if (m_num_ranges != other.m_num_ranges)
return false;
+ if (m_num_ranges == 0)
+ return true;
+
for (unsigned i = 0; i < m_num_ranges; ++i)
{
tree lb = tree_lower_bound (i);
--
2.37.1
next prev parent reply other threads:[~2022-10-03 11:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-03 11:08 [COMMITTED] Do not compare incompatible ranges in ipa-prop Aldy Hernandez
2022-10-03 11:08 ` [COMMITTED] Do not compare nonzero masks for varying Aldy Hernandez
2022-10-03 11:08 ` Aldy Hernandez [this message]
2022-10-03 11:08 ` [COMMITTED] Do not pessimize range in set_nonzero_bits Aldy Hernandez
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20221003110815.1075975-3-aldyh@redhat.com \
--to=aldyh@redhat.com \
--cc=amacleod@redhat.com \
--cc=gcc-patches@gcc.gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).